Advice on plot point in my novel sought?

I agree with the first 2 answerers that (v) is a little off. Also (vi) because I think if the husband would at least put up a fight and try to see his son or gain joint custody or something. If he really loved his son, he wouldn't just give up on him so easily. The rest of it sounds ok, but I think the way you portray or characterize the mother is going to be important. Is she even trying to forgive her husband? Why exactly is she so bent on this idea that its all his fault? Does she not blame herself a bit? She honestly sounds a bit mental to me. I don't really believe her character. I can't really see any depth or logical sense to her actions. Yes, she's grieving. But at a certain point in that grief process, there's got to be some kind of change, whether she realizes it wasn't all his fault or she blames herself or she accepts what happened or whatever. But to carry on and on hating her husband like that---it almost sounds like she's got a mental problem. There's no rationality behind it. Again, I know she's grieving, but again, at some point, a person is going to start to think more logically about things. If you want the story to be believable, there needs to be a good, solid explanation for all that. Even if there's just a simple understanding. Let us inside her head, really show readers what's going on in there.